・ Wear appropriate protective equipment such as masks and goggles during use, and be careful not to let dust get in eyes or respiratory organs.
・ Do not eat, drink or smoke while using.
・ Wash your hands often after use and change contaminated clothes.
・ After use, keep tightly sealed and store in a dry place out of the reach of children.
・ If silver is used, it may be combined with sulfur in the air and turn black.